Hi TG20!
I understand that you're having issues with the email sent by Outlook. I'm here to assist you.
When sending invoices via Outlook, they are the ones who are responsible for editing and sending them. QuickBooks Desktop does not have any control over this.
Also, we already raised this concern to our developers and they are now doing their best to have it fixed. I suggest contacting them for further help.
In the meantime, you'll want to set up the webmail or edit your template in QuickBooks. When using webmail, it requires a manual edit prior to sending the email. For the detailed steps, you may check these links:
You may visit our QBDT Articles page. From there, you'll see different references for managing your business.
Need more assistance? Just comment below and we'll respond as soon as we can.